Update docs and other details

config.sample.py

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+config = {
+    'fallback_command': 'natural_language.process',
+    'fallback_command_after_nl_processors': 'ai.tuling123',
+    'command_start_flags': ('/', '／', '来，', '来,'),  # Add '' (empty string) here to allow commands without start flags
+    'command_name_separators': ('->', '::', '/'),  # Regex
+    'command_args_start_flags': ('，', '：', ',', ', ', ':', ': '),  # Regex
+    'command_args_separators': ('，', ','),  # Regex
+
+    'message_sources': [
+        {
+            'via': 'mojo_webqq',
+            'login_id': '12345678',
+            'superuser_id': '23456789',
+            'api_url': 'http://127.0.0.1:5000/openqq',
+        },
+        {
+            'via': 'mojo_weixin',
+            'login_id': 'your_login_id',
+            'superuser_id': 'your_superuser_id',
+            'api_url': 'http://127.0.0.1:5001/openwx',
+        }
+    ]
+}